co.cask.cdap.dq

Class DataQualityApp.AggregationReducer

java.lang.Object

org.apache.hadoop.mapreduce.Reducer<Text,DataQualityWritable,byte[],Put>

co.cask.cdap.dq.DataQualityApp.AggregationReducer

All Implemented Interfaces:

ProgramLifecycle<MapReduceContext>

Enclosing class:

DataQualityApp

public static class DataQualityApp.AggregationReducer
extends Reducer<Text,DataQualityWritable,byte[],Put>
implements ProgramLifecycle<MapReduceContext>

Generate and write an aggregation with the data collected by the mapper

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.Reducer

Reducer.Context

Constructor Summary

Constructors

Constructor and Description
DataQualityApp.AggregationReducer()

Method Summary

Methods

Modifier and Type	Method and Description
void	destroy()
void	initialize(MapReduceContext mapReduceContext)
void	reduce(Text key, Iterable<DataQualityWritable> values, Reducer.Context context)

Methods inherited from class org.apache.hadoop.mapreduce.Reducer

cleanup, run, setup

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DataQualityApp.AggregationReducer

public DataQualityApp.AggregationReducer()

Method Detail

initialize

public void initialize(MapReduceContext mapReduceContext)
                throws Exception

Specified by:

initialize in interface ProgramLifecycle<MapReduceContext>

Throws:

Exception

reduce

public void reduce(Text key,
          Iterable<DataQualityWritable> values,
          Reducer.Context context)
            throws IOException,
                   InterruptedException

Overrides:

reduce in class Reducer<Text,DataQualityWritable,byte[],Put>

Throws:

IOException

InterruptedException

destroy

public void destroy()

Specified by:

destroy in interface ProgramLifecycle<MapReduceContext>